SOLUTION: The following equation can be used to find the area of a trapezoid. Solve for the variable b: A=1/2h(B+b) I can't seem to figure this one out. I know that B + b represent th

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Question 117306: The following equation can be used to find the area of a trapezoid. Solve for the variable b:
A=1/2h(B+b)
I can't seem to figure this one out. I know that B + b represent the lenght of the trapezoid and there are four possible solutions we were given:
B=2A/h
b=B(A-1/2h)
b=A-Bh
b=(2A/h)-B
It can't be the first one, because I am not looking for B, but for b.
Any help would be greatly appreciated.

Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Start with the given equation


Multiply both sides by 2


Divide both sides by h


Subtract B from both sides to isolate b


So our answer is

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